Homework $-$ Tailgate Panel Appearance

Defects known as 'streaks' were produced during the sanding operation on aluminum tailgate panels. An experiment was designed to eliminate these streaks, which would reduce a $5\%$ scrap and rework rate.

A brainstorming session initially identified $17$ factors. These were refined to $7$ factors at $2$ levels each.

y $=$ 'streaks' $($good$,$ normal, bad$)$

Parts graded as good or normal were acceptable to customers.

$\backslash$table$[[$Control Factors,Level $1,$Level $2],[$A: Wheel Grade,New,Used$],[$B: Table Speed,$200$ parts$/$hr$,225$ parts$/$hr$],[$C: Wheel Weight,$30lb,20bb$